Heating structure utilizing engine tail gas and asphalt transfer trolley

Abstract

The utility model discloses a heating structure utilizing engine tail gas in the field of asphalt transfer trucks, which comprises a gas channel arranged at the bottom of a storage bin and a shunt box connected with an engine exhaust pipe, the shunt box is externally connected with a heating pipe and a tail gas pipe, the heating pipe is communicated with the gas channel, the other end of the gas channel is provided with an exhaust port, and the tail gas pipe is communicated with the exhaust port. The tail gas pipe is communicated with outside air; the flow dividing box comprises a box body and a reversing valve used for controlling connection and disconnection between the heating pipe and the box body and between the tail gas pipe and the box body. And when one of the heating pipe and the tail gas pipe is not communicated with the box body, the other one of the heating pipe and the tail gas pipe is communicated with the box body. The reversing valve is arranged to control connection and disconnection between the box body and the tail gas pipe and between the box body and the heating pipe, in the process that the reversing valve controls connection and disconnection, one of the tail gas pipe and the heating pipe is always connected with the box body, it is ensured that gas entering the flow dividing box can be normally exhausted, and the situation that gas flows back into an engine, and safety accidents happen is avoided.

Description

Technical Field

[0001] This utility model relates to the field of asphalt transfer vehicles, and in particular to a heating structure utilizing engine exhaust gas and an asphalt transfer vehicle. Background Technology

[0002] With the continuous development of the road construction industry, the requirements for the construction quality of asphalt concrete pavements are becoming increasingly stringent. Temperature control is one of the key factors affecting pavement quality during the transportation and paving of asphalt concrete. Currently, traditional asphalt transport trucks require multi-stage conveyor belts and waiting times during unloading. During this process, the asphalt mixture experiences a significant temperature drop, which makes it difficult to distribute evenly during paving, thus affecting the smoothness and compaction of the pavement. Existing solutions mostly involve adding a simple thermal insulation layer to the bottom of the transport truck's conveyor belt.

[0003] There are quite a few existing patents that use engine exhaust to heat asphalt concrete. Using engine exhaust for heating is both environmentally friendly and convenient. For example, the patent entitled "Exhaust pipe air bleed device and asphalt heating system for asphalt transport vehicle" with application number "202011383170.4" uses a first brake valve and a second brake valve to control the exhaust gas to be input into the cargo box to heat the asphalt or discharged into the air.

[0004] If the brake valve is closed and cannot be opened during use, the engine will continue to run. The high-temperature gas produced cannot be discharged and will flow back into the engine, posing a risk of engine damage or explosion, thus posing a safety risk. Utility Model Content

[0005] The purpose of this utility model is to provide a heating structure that utilizes engine exhaust gas. By setting a reversing valve, one of the exhaust pipe and the heating pipe is always connected to the housing, ensuring that the gas entering the distribution box can be discharged normally.

[0006] To solve the above technical problems, the following technical solution is adopted:

[0007] In a first aspect, this utility model provides a heating structure utilizing engine exhaust gas, comprising: an air passage disposed on a storage bin and a distribution box connected to the engine's exhaust pipe, wherein a heating pipe and an exhaust pipe are externally connected to the distribution box, the heating pipe is connected to the air passage, the other end of the air passage is provided with an exhaust port, and the exhaust pipe is connected to the outside air.

[0008] The diversion box includes a housing for installing the heating pipe and the exhaust pipe, and a reversing valve for controlling the connection and disconnection between the heating pipe and the exhaust pipe and the housing.

[0009] The end of the exhaust pipe connected to the housing is a variable diameter pipe structure used to reduce gas back pressure.

[0010] When one of the heating pipes or the exhaust pipe is not connected to the housing, the other is connected to the housing.

[0011] Optionally, the gas passage includes two U-shaped channels forming an open rectangular structure. The first ends of the two U-shaped channels are respectively connected to the heating pipes on both sides of the housing. Both sides of the housing are provided with exhaust pipes.

[0012] Optionally, the reversing valve includes a linear actuator, a movable bracket, and a valve. The linear actuator drives the movable bracket to perform linear movement. The valve is connected to the movable bracket, and the movable bracket drives the valve to move, thereby controlling the on / off state of the heating tube and the exhaust pipe.

[0013] Optionally, the movable support includes a straight rod and support rods located at both ends of the straight rod. The support rods are perpendicular to the straight rod, and the other end of the support rod is provided with a guide groove, which is movably connected to the reversing valve.

[0014] Optionally, the support rods at both ends of the straight rod are located on the upper and lower surfaces of the housing, respectively, and the guide groove is also located on the surface of the housing. Limiting blocks for restricting the up and down movement of the support rod are provided on both the upper and lower surfaces of the housing.

[0015] Optionally, the valve includes a valve plug plate, a steering shaft, and a connecting rod. The steering shaft has two valve plug plates, which are used to disconnect the heating pipe and the exhaust pipe from the housing, respectively. Both ends of the steering shaft have vertically arranged connecting rods, and the other end of each connecting rod has a pulley. The pulleys on the two connecting rods are arranged face to face and are mounted on the movable support. When the movable support moves linearly, the steering shaft rotates, thereby causing the valve plug plates to disconnect the heating pipe and the exhaust pipe.

[0016] Optionally, the included angle between the two valve plugs is 90°, and when the steering shaft rotates to the position where one valve plug is located at the air inlet of the heating pipe or the exhaust pipe, the other valve plug is located away from the air inlet of the exhaust pipe or the heating pipe, so that gas can be discharged from one of the exhaust pipe or the heating pipe.

[0017] Optionally, the rotating shaft on the valve is installed on the inner side of the diversion box, with both ends of the rotating shaft extending from the upper and lower surfaces of the box. The connecting rods at both ends are located on the upper and lower surfaces of the box, respectively, and the pulleys on the connecting rods cooperate with the movable bracket.

[0018] Optionally, a muffler is provided on the exhaust pipe.

[0019] Secondly, this utility model provides an asphalt transfer vehicle, including the heating structure using engine exhaust gas as described in the first aspect.

[0020] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0021] 1. This utility model uses a reversing valve to control the connection and disconnection between the housing and the exhaust pipe and heating pipe. During the reversing valve's control of the connection and disconnection, one of the exhaust pipe and heating pipe is always connected to the housing, ensuring that the gas entering the distribution box can be discharged normally and preventing gas backflow into the engine, thus avoiding a safety accident. The exhaust pipe end connected to the housing in this utility model uses a reducing pipe structure, which effectively reduces the back pressure of the gas entering the housing, preventing excessive back pressure from damaging the internal structure of the housing and improving the durability of the equipment.

[0022] 2. This utility model achieves the sealing of the exhaust pipe and heating pipe openings through two valve plugs with an included angle of 90 degrees on the valve. The exhaust pipe and heating pipe are located on the same side, and the included angle of the pipe openings inside the box is 180 degrees. Therefore, when the two valves with an included angle of 90 degrees are in different positions, there is a channel connected to the box, which can normally discharge gas and improve the safety of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the heating structure utilizing engine exhaust gas in an embodiment of this utility model;

[0024] Figure 2 This is a schematic diagram of the flow divider structure in an embodiment of this utility model;

[0025] Figure 3 This is a schematic diagram of the exhaust pipe structure in an embodiment of this utility model;

[0026] Figure 4 This is one of the schematic diagrams of the gas flow direction inside the distribution box in this utility model embodiment;

[0027] Figure 5 This is the second schematic diagram of the gas flow direction inside the diversion box in this utility model embodiment;

[0028] Figure 6 This is a schematic diagram of the movable support structure in an embodiment of this utility model;

[0029] Figure 7 This is one of the schematic diagrams of the valve structure in the embodiments of this utility model;

[0030] Figure 8 This is the second schematic diagram of the valve structure in the embodiments of this utility model;

[0031] Figure 9This is a schematic diagram of the asphalt transfer vehicle structure in an embodiment of this utility model.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Engine; 2. Air passage; 21. Exhaust port; 3. Diverter box; 31. Box body; 32. Heating tube; 33. Exhaust pipe; 34. Exhaust pipe; 35. Movable bracket; 351. Straight rod; 352. Support rod; 353. Guide groove; 354. Ear plate; 36. Valve; 361. Valve plug; 362. Steering shaft; 363. Connecting rod; 364. Pulley; 37. Linear actuator; 38. Limit block; 4. Muffler; 5. Storage bin; 6. Receiving hopper; 7. Primary conveyor belt; 8. Secondary conveyor belt; 9. Tertiary conveyor belt. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0036] like Figure 1 , Figure 2 As shown, this embodiment provides a heating structure that utilizes engine exhaust gas, including an air passage 2 installed on a storage bin 5 and a distribution box 3 connected to the exhaust pipe 34 of an engine 1. Both sides of the distribution box 3 are provided with heating pipes 32 and exhaust pipes 33. The other end of the heating pipe 32 is connected to one end of the air passage 2. The other end of the air passage 2 is provided with an exhaust port 21. The tail end of the exhaust pipe 33 is connected to the outside air.

[0037] The air passage 2 is located between the inner and outer walls of the storage bin 5. When the high-temperature gas generated by the engine 1 passes through it, it heats or keeps the material inside the storage bin 5 warm.

[0038] The diversion box 3 includes a box body 31 and a reversing valve installed on the box body 31. The reversing valve is used to control the connection and disconnection between the heating pipe 32 and the box body 31 and the connection and disconnection between the exhaust pipe 33 and the box body 31.

[0039] The exhaust pipe 34 of engine 1 is connected to the housing 31. The gas discharged from engine 1 enters the housing 31. Controlled by the reversing valve, the gas enters the air passage 2 from the heating pipe 32 and then exits from the exhaust port 21. The gas passes through the air passage 2 to insulate or heat the material in the storage bin 5. Alternatively, the gas can be discharged directly from the tailpipe 33. The end of the exhaust pipe 34 connected to the housing 31 is a Venturi reducer structure. The Venturi reducer structure can reduce the back pressure of the gas discharged from engine 1, further warming the gas entering the housing 31 and reducing the damage to the internal structure of the housing 31.

[0040] like Figure 2 , Figure 3 As shown, the Venturi reducer structure at the end of exhaust pipe 34 has a large diameter of D and a small diameter of d, with the diameter change being D / d=β (β>1), which can effectively solve the problem of long exhaust distance and high back pressure in exhaust pipe.

[0041] During the process of controlling the connection and disconnection between the heating pipe 32 and the exhaust pipe 33 and the housing 31, the reversing valve ensures that when the exhaust pipe 33 is not connected to the housing 31, the heating pipe 32 is connected to the housing 31; conversely, when the heating pipe 32 is not connected to the housing 31, the exhaust pipe 33 is connected to the housing 31. This prevents one of the exhaust pipe 33 or the heating pipe 32 from connecting to the housing 31 in case the reversing valve is damaged, thus venting the gas inside the housing 31 and preventing backflow of gas from the housing 31 into the engine 1, which could lead to a safety accident.

[0042] The reversing valve includes a valve 36, which has two valve plugs 361 with an included angle of 90 degrees. The valve plugs 361 are located inside the housing 31. Since the heating pipe 32 and the exhaust pipe 33 are located on the same side of the housing 31, the included angle between the openings of the heating pipe 32 and the exhaust pipe 33 inside the housing 31 is 180 degrees. When one of the valve plugs 361 seals the opening of the exhaust pipe 33, the other valve plug 361, with an included angle of 90 degrees, does not seal the opening of the heating pipe 32. This ensures that the reversing valve, regardless of its operating state, always has a pipe to discharge gases entering the housing 31 from the exhaust pipe 34 of the engine 1, ensuring equipment safety and preventing accidents. Example 2

[0043] The difference between this embodiment and Embodiment 1 is that:

[0044] The reversing valve also includes a movable bracket 35 and a linear actuator 37. The movable bracket 35 is connected to the linear actuator 37 and is driven to make linear movements. The movable bracket 35 is connected to the valve 36 and drives the valve 36 to make rotational movements, thereby controlling the position of the two valve plugs 361 on the valve 36.

[0045] like Figure 4 , Figure 7 , Figure 8 As shown, valve 36 also includes a steering shaft 362, a connecting rod 363 and a pulley 364. Both ends of the steering shaft 362 are provided with connecting rods 363, and the ends of the two connecting rods 363 are provided with pulleys 364. The pulleys 364 on the two connecting rods 363 are arranged face to face. Valve plug plate 361 is provided on the steering shaft 362. The steering shaft 362 is located inside the housing 31 and between the heating pipe 32 and the exhaust pipe 33. Both ends of the steering shaft 362 extend from the upper and lower surfaces of the housing 31. The connecting rod 363 is located on the outer surface of the housing 31. The pulley 364 on the connecting rod 363 is connected to the movable bracket 35. When the movable bracket 35 makes linear movements, it drives the connecting rod 363 to rotate around the end of the steering shaft 362. The connecting rod 363 is fixedly connected to the steering shaft 362, thereby realizing the rotation of the steering shaft 362 around the central axis and realizing the sealing of the two valve plugs 361 on it to the openings of the exhaust pipe 33 and the heating pipe 32 inside the housing 31.

[0046] like Figure 1 , Figure 2 , Figure 4 , Figure 6 As shown, the movable support 35 includes a straight rod 351, two support rods 352, and two guide grooves 353. Figure 6The red arrow indicates that the movable support 35 moves in this direction via the linear actuator 37. Support rods 352 are vertically mounted at both ends of the straight rod 351, and guide grooves 353 are respectively provided at the other ends of the two support rods 352. An ear plate 354 is provided in the middle of the straight rod 351, and the ear plate 354 is connected to the output shaft of the linear actuator 37. The straight rod 351 is located on the side of the housing 31 opposite to the exhaust pipe 34. The two support rods 352 on the straight rod 351 are located on the upper and lower surfaces of the housing 31, respectively. The guide grooves 353 on the support rods 352 are also located on the upper and lower surfaces of the housing 31. The guide grooves 353 are perpendicular to the side where the heating pipe 32 and the exhaust pipe 33 are located. The pulley 364 on the connecting rod 363 cooperates with the guide groove 353.

[0047] The linear actuator 37 drives the movable bracket 35 to slide on the surface of the housing 31. Since the pulley 364 is in the guide groove 353, when the guide groove 353 moves on the upper and lower surfaces of the housing 31, it drives the connecting rods 363 on both sides to rotate around the end of the steering shaft 362. Since the steering shaft 362 and the connecting rod 363 are fixedly connected, the steering shaft 362 is driven to rotate around the central axis, thereby driving the two valve plugs 361 on the steering shaft 362 to change position and seal the openings of the exhaust pipe 33 and the heating pipe 32 located in the housing 31.

[0048] like Figure 8 As shown, the connecting rod 363 is located between two valve plugs 361, with an angle α between it and one of the valve plugs 361. When the connecting rod 363 is pulled and rotated by the movable bracket 35, the connecting rod 363 is always located on the surface of the housing 31, ensuring stable use of the structure.

[0049] Two valves 36 are provided, located on both sides of the housing 31 where the heating pipe 32 and the exhaust pipe 33 are respectively located. Limiting blocks 38 are also provided on the upper and lower surfaces of the housing 31. The limiting blocks 38 have through holes. The support rod 352 on the movable bracket 35 passes through the through holes to limit the up and down movement of the support rod 352 and ensure the stability of the structure.

[0050] A muffler 4 is provided on the exhaust pipe 34. The muffler 4 can reduce the sound of the exhaust gas from the engine 1, thereby reducing exhaust noise.

[0051] The storage silo 5 is funnel-shaped. Air passages 2 are located on both sides of the bottom of the storage silo 5. Each air passage 2 consists of two U-shaped channels forming an open rectangular structure. One end of each U-shaped channel is connected to a heating pipe 32, and the other end is equipped with an exhaust port 21. The exhaust port 21 is located in the middle of the side plate of the storage silo 5. The gas entering the air passage 2 from the heating pipe 32 exchanges heat with the material inside the storage silo 5, thereby heating the material. Since the exhaust port 21 is located in the middle of the storage silo 5, the discharged gas retains residual heat, which can then act on the middle part of the bottom of the storage silo 5. This achieves overall heat preservation or heating of the material inside the storage silo 5.

[0052] like Figure 2 , Figure 4 As shown, the red arrow indicates the direction of gas flow. The high-temperature gas generated by the engine 1 enters the distribution box 3 from the exhaust pipe 34. The valve 36 seals the opening of the exhaust pipe 33 located in the distribution box 3. The heating pipe 32 is connected to the box body 31. After the high-temperature gas flows through the heating pipe 32, it enters the two U-shaped channels on both sides of the bottom of the storage bin 5. After passing through the U-shaped channel, the high-temperature gas is discharged from the exhaust port 21 on the other end, thereby heating or keeping the material in the storage bin 5 warm.

[0053] like Figure 5 As shown, the red arrow indicates the direction of gas flow. The valve plug 361 inside the housing 31 seals the heating tube 32 port, and the high-temperature gas generated by the engine 1 is directly discharged from the exhaust pipe 33.

[0054] The heating structure utilizing engine exhaust gas provided in this embodiment, controlled by valve 36, ensures that either the heating pipe 32 or the exhaust pipe 33 connected to the housing 31 is open under any circumstances, allowing the high-temperature gas from engine 1 to be discharged. Throughout the entire process of the movable bracket 35 driving the valve 36 to rotate, a channel is maintained for the high-temperature gas to be discharged. This ensures equipment safety and prevents accidents. Example 3

[0055] like Figure 9 As shown, this embodiment provides an asphalt transfer vehicle based on Example 2, including a receiving hopper 6, a storage bin 5, a primary conveyor belt 7, a secondary conveyor belt 8, and a tertiary conveyor belt 9. The receiving hopper 6 receives asphalt concrete material from the transport vehicle, and the material is conveyed to the storage bin 5 by the primary conveyor belt 7. The storage bin 5 has a buffer function, can hold a certain volume of asphalt concrete material, and has an engine exhaust heating structure at its bottom. During use, the engine exhaust heating structure heats or insulates the material in the storage bin 5. The secondary conveyor belt 8 conveys the mixture to the tertiary conveyor belt 9, and finally to the paver.

[0056] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A heating structure utilizing exhaust gas of an engine, characterized by, include: An air passage is installed on the storage silo and a distribution box is connected to the exhaust pipe of the engine. The distribution box is externally connected to a heating pipe and an exhaust pipe. The heating pipe is connected to the air passage. An exhaust port is provided at the other end of the air passage. The exhaust pipe is connected to the outside air. The diversion box includes a housing for installing the heating pipe and the exhaust pipe, and a reversing valve for controlling the connection and disconnection between the heating pipe and the exhaust pipe and the housing. The end of the exhaust pipe connected to the housing is a variable diameter pipe structure used to reduce gas back pressure. When one of the heating pipes or the exhaust pipes is disconnected from the housing, the other is connected to the housing.

2. The heating structure using engine exhaust according to claim 1, characterized by, The gas passage includes two U-shaped channels that form a broken rectangular structure. The first ends of the two U-shaped channels are respectively connected to the heating pipes on both sides of the box. Both sides of the box are provided with exhaust pipes.

3. The heating structure using engine exhaust according to claim 1, characterized by, The reversing valve includes a linear actuator, a movable bracket, and a valve. The linear actuator drives the movable bracket to perform linear movement. The valve is connected to the movable bracket, and the movable bracket drives the valve to move, thereby controlling the on / off state of the heating tube and the exhaust pipe.

4. The heating structure using engine exhaust according to claim 3, characterized by, The movable support includes a straight rod and support rods located at both ends of the straight rod. The support rods are perpendicular to the straight rod, and the other end of the support rod is provided with a guide groove, which is movably connected to the reversing valve.

5. The heating structure using engine exhaust according to claim 4, characterized by, The support rods at both ends of the straight rod are located on the upper and lower surfaces of the box body, respectively. The guide groove is also located on the surface of the box body. Limiting blocks for restricting the up and down movement of the support rod are provided on both the upper and lower surfaces of the box body.

6. The heating structure using engine exhaust according to claim 3, characterized by The valve includes a valve plug plate, a steering shaft, and connecting rods. Two valve plug plates are provided on the steering shaft, which are used to disconnect the heating pipe and the exhaust pipe from the housing, respectively. Vertically arranged connecting rods are provided at both ends of the steering shaft, and pulleys are provided at the other end of the connecting rods. The pulleys on the two connecting rods are arranged face to face and are mounted on the movable bracket. When the movable bracket makes linear movement, the steering shaft makes rotational movement, thereby driving the valve plug plates to disconnect the heating pipe and the exhaust pipe.

7. The heating structure using engine exhaust according to claim 6, characterized by The included angle between the two valve plugs is 90°. When the steering shaft rotates to the point where one valve plug is located at the air inlet of the heating pipe or the exhaust pipe, the other valve plug is moved away from the air inlet of the exhaust pipe or the heating pipe, so that gas can be discharged from one of the exhaust pipe or the heating pipe.

8. The heating structure using engine exhaust according to claim 6, characterized by, The rotating shaft on the valve is installed on the inner side of the diversion box. Both ends of the rotating shaft extend from the upper and lower surfaces of the box. The connecting rods at both ends are located on the upper and lower surfaces of the box, respectively. The pulleys on the connecting rods cooperate with the movable bracket.

9. The heating structure using engine exhaust according to claim 1, characterized by, A muffler is installed on the exhaust pipe.

10. An asphalt transfer vehicle characterized by, Including the heating structure utilizing engine exhaust gas as described in any one of claims 1-9.

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